Fix missing defaults for DW overlay network and private worker nodes

Signed-off-by: Webster Mudge <wmudge@cloudera.com>

Author: wmudge

roles/runtime/defaults/main.yml

@@ -68,9 +68,9 @@ run__dw_definitions:                "{{ dw.definitions | default([{}]) }}"
 run__dw_dbc_suffix:                 "{{ dw.dbc.suffix | default('dbc') }}"
 run__dw_vw_suffix:                  "{{ dw.vw.suffix | default('vw') }}"
 run__dw_tags:                       "{{ dw.tags | default(common__tags) }}"
-run__dw_overlay_network:            "{{ dw.overlay_network | bool }}"
+run__dw_overlay_network:            "{{ dw.overlay_network | default(False) | bool }}"
 run__dw_private_load_balancer:      "{{ dw.private_load_balancer | default(not run__public_endpoint_access) }}"
-run__dw_private_worker_nodes:       "{{ dw.private_worker_nodes | bool }}"
+run__dw_private_worker_nodes:       "{{ dw.private_worker_nodes | default(False) | bool }}"
 run__dw_force_delete:               "{{ dw.force_delete | default (run__force_teardown) }}"
 run__dw_default_vw_type:            "{{ dw.default_vw_type | default('hive') }}"
 run__dw_default_template_type:      "{{ dw.default_template_type | default('xsmall') }}"